Semiconductor Memory Device and Memory System

1. An autonomous vehicle computing system comprising: a controller configured to output a clock signal and a command, and configured to input or output data; a memory device configured to: receive the clock signal and the command; transmit or receive the data; measure a number of at least one of the clock signal, the data and the command; and generate a remaining lifetime value representing a remaining lifetime of the memory device based on the measured number; and a display device configured to display the remaining lifetime represented by the remaining lifetime value.

2. The autonomous vehicle computing system of claim 1, wherein the memory device recalculates the remaining lifetime value when a parameter related to the remaining lifetime changes, and stores the recalculated remaining lifetime value in a mode register of the memory device, and wherein the display device read the recalculated remaining lifetime value from the mode register of the memory device, and displays the remaining lifetime represented by the recalculated remaining lifetime value.

3. The autonomous vehicle computing system of claim 2, wherein the memory device includes a temperature sensor configured to detect a temperature, and recalculates the remaining lifetime value when the temperature changes.

4. The autonomous vehicle computing system of claim 2, wherein the memory device includes a refresh interval detector configured to detect an interval between refresh commands, and recalculates the remaining lifetime value when the interval changes.

5. The autonomous vehicle computing system of claim 2, wherein the memory device includes a clock monitor configured to monitor a clock speed of the clock signal, and recalculates the remaining lifetime value when the clock speed changes.

6. The autonomous vehicle computing system of claim 1, wherein the memory device includes a mode register configured to store the remaining lifetime value, and wherein the remaining lifetime value stored in the mode register has a first value representing that the remaining lifetime is a maximum lifetime, a second value representing that no remaining lifetime exists, or a value between the first value and the second value representing a ratio of the remaining lifetime to the maximum lifetime.

7. The autonomous vehicle computing system of claim 1, wherein, when the remaining lifetime represented by the remaining lifetime value becomes lower than or equal to a reference remaining lifetime, the controller outputs an alarm by using the display device and/or another output device.

8. The autonomous vehicle computing system of claim 1, wherein the memory device recalculates the remaining lifetime when a parameter related to the remaining lifetime changes, and wherein, when the recalculated remaining lifetime becomes lower than or equal to a reference remaining lifetime, the controller outputs an alarm by using the display device and/or another output device.

9. The autonomous vehicle computing system of claim 1, wherein the memory device includes: a remaining lifetime calculating device configured to count usage metrics based on one or more of the following: a number of clock signals received from the controller, an amount of data transmitted or received to or from the controller, and/or a number of commands received from the controller.

10. A method of representing a remaining lifetime of a memory device in an autonomous vehicle computing system, the method comprising: displaying the remaining lifetime of the memory device on a display device received from the memory device, wherein the remaining lifetime of the memory device is generated in the memory device based on a measured number of at least one of a clock signal, input data, out data and a command.

11. The method of claim 10, further comprising: recalculating the remaining lifetime when a parameter related to the remaining lifetime changes; storing a remaining lifetime value representing the recalculated remaining lifetime in a mode register of the memory device; reading the remaining lifetime value from the mode register of the memory device; and displaying the remaining lifetime based on the read remaining lifetime value.

12. The method of claim 10, wherein the memory device includes a mode register configured to store a remaining lifetime value representing the remaining lifetime of the memory device, and wherein the remaining lifetime value stored in the mode register has a first value representing that the remaining lifetime is a maximum lifetime, a second value representing that no remaining lifetime exists, or a value between the first value and the second value representing a ratio of the remaining lifetime to the maximum lifetime.

13. The method of claim 10, further comprising: outputting an alarm by using the display device and/or another output device when the remaining lifetime becomes lower than or equal to a reference remaining lifetime value.

14. The method of claim 10, further comprising: recalculating the remaining lifetime when a parameter related to the remaining lifetime changes; and outputting an alarm by using the display device and/or another output device when the recalculated remaining lifetime becomes lower than or equal to a reference remaining lifetime.

15. The method of claim 10, further comprising: counting usage metrics based on one or more of the following: a number of clock signals received from the controller, an amount of data transmitted or received to or from the controller, and/or a number of commands received from the controller.

16. An autonomous vehicle computing system comprising: a controller configured to output a clock signal and a command, and configured to input or output data; a memory device configured to: receive the clock signal and the command; transmit or receive the data; measure a number of at least one of the clock signal, the data and the command; and generate a remaining lifetime value representing a remaining lifetime of the memory device based on the measured number; and a display device configured to display the remaining lifetime represented by the remaining lifetime value, wherein the memory device includes a mode register that stores parameter setting information including a parameter used to determine the remaining lifetime of the memory device.

17. The autonomous vehicle computing system of claim 16, wherein the memory device selects a clock number of the clock signal, a data number of the data, and/or a command number of the command based on the parameter setting information stored in the mode register to generate the remaining lifetime value.

18. The autonomous vehicle computing system of claim 16, wherein four bits of the mode register store the parameter setting information.

19. The autonomous vehicle computing system of claim 18, wherein a first bit of the mode register indicates whether the clock signal is used in calculating the remaining lifetime, wherein a second bit of the mode register indicates whether the data is used in calculating the remaining lifetime, wherein a third bit of the mode register indicates whether read and write commands are used in calculating the remaining lifetime, and wherein a fourth bit of the mode register indicates whether a refresh command is used in calculating the remaining lifetime.

20. The autonomous vehicle computing system of claim 18, wherein, when the four bits of the mode register store a value of ‘0001’, the memory device uses the clock signal in calculating the remaining lifetime, wherein, when the four bits of the mode register store a value of ‘0010’, the memory device uses the data in calculating the remaining lifetime, wherein, when the four bits of the mode register store a value of ‘0100’, the memory device uses read and write commands in calculating the remaining lifetime, wherein, when the four bits of the mode register store a value of ‘1000’, the memory device uses a refresh command in calculating the remaining lifetime, and wherein, when the four bits of the mode register store a value of ‘1111’, the memory device uses all of the clock signal, the data, the read and write commands and the refresh command in calculating the remaining lifetime.